Have you read Debt: The First 5000 Years? That's the core concept from that book and I found it really interesting. It tears down the common school example of

Have you read Debt: The First 5000 Years? That's the core concept from that book and I found it really interesting. It tears down the common school example of barter based economies preceding money. In most societies people kept an informal ledger of favours owed in their heads and had a rough idea of commensurate value over time. Direct barter was relatively rare.